   "Executes elasticsearch searches to find collections that have deleted revisions.
    Returns a list of concept-ids of the collections."
   [context params]
-  ;;1/ Find all collection revisions that are deleted satisfy the original search params
+  ;; Find all collection revisions that are deleted satisfying the original search params
   (let [query (make-concepts-query context :collection params)
         condition (gc/and-conds
                    [(:condition query)

                                  #(apply max (map :revision-id %))
                                  (group-by :concept-id (:items results)))
          highest-revisions (filter
                             #((set highest-coll-revisions)
                               [(:concept-id %) (:revision-id %)])
                             (:items results))]
      (-> results
          (assoc :items highest-revisions)

        ;; when results is nil, hits is 0
        results (or results {:hits 0 :items []})
        total-took (- (System/currentTimeMillis) start-time)
        ;; construct the response results string
        results-str (common-search/search-results->response
                     context
                     ;; pass in a fake query to get the desired response format
